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Compare two means IQ and Lead Exposure. A sample of subjects with low lead levels in...

Compare two means

IQ and Lead Exposure.

A sample of subjects with low lead levels in their blood was taken and another random sample was taken with high levels of level in their blood. Use a 0.05 significance level to test the claim that the mean IQ score of people with low lead levels is higher than the mean IQ score of people with high lead levels. Use a Pvalue approach

                Low lead level n = 78   Sample mean=92.88           s = 15.34

                High lead level n =21     Sample mean = 86.90        s= 8.99

Math   Statistics-And-Probability   
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